 body {
     background: aqua;
 }
 

.title {
    width: 15em;
    font-family: "Arial Black", Gadget, sans-serif;
    font-weight: 700;
    margin-left: auto; 
    margin-right: auto;
    margin-top: 2.5%;
    margin-bottom: 5%;
  }
  .message {
    margin-top: 2%;
    margin-left: 38%;
  }
  .message .text {
    color: rgb(255, 0, 0);
  }
  .window {
    margin-top: 7%;
    margin-left: 38%;
  }
  .button {
    margin-top: 5%;
    margin-left: 44%; 
  }